Optical Broadband Angular Selectivity Yichen Shen, Dexin Ye, Ivan Celanovic,
... across a broadband spectrum. We provide theory as well as experimental realization with an all-visible-spectrum, p-polarized angularly selective material system. Our method enables transparency throughout the visible spectrum at one angle, the generalized Brewster angle, and reflection at every othe ...
... across a broadband spectrum. We provide theory as well as experimental realization with an all-visible-spectrum, p-polarized angularly selective material system. Our method enables transparency throughout the visible spectrum at one angle, the generalized Brewster angle, and reflection at every othe ...
CP1: Investigation into the Feasibility of a Three Axis
... the case that such features, despite being colourless and transparent, do have varying refractive indexes. This produces the reflections and/or changes in optical path length1 required for interferometry, making it more suitable than other methods such as bright field microscopy. Another, less obvio ...
... the case that such features, despite being colourless and transparent, do have varying refractive indexes. This produces the reflections and/or changes in optical path length1 required for interferometry, making it more suitable than other methods such as bright field microscopy. Another, less obvio ...
optical/photonic bandwidth
... to the inverse relationship of frequency and wavelength. The conversion factor between gigahertz and nanometres depends on the centre wavelength or frequency. For converting a—small—wavelength interval into a frequency interval, the equation can be used. ...
... to the inverse relationship of frequency and wavelength. The conversion factor between gigahertz and nanometres depends on the centre wavelength or frequency. For converting a—small—wavelength interval into a frequency interval, the equation can be used. ...
2.1. Specifications and designs
... It is shown that for the set specifications the HL design is more favourable than the rugate approaches. In fact, as a conclusion from the maximum principle13, in the case of normal incidence the optimum design will be the one using only two materials, having maximal possible refractive index contra ...
... It is shown that for the set specifications the HL design is more favourable than the rugate approaches. In fact, as a conclusion from the maximum principle13, in the case of normal incidence the optimum design will be the one using only two materials, having maximal possible refractive index contra ...
polarization_magnifier
... perpendicular component is Ty 1 . With the chosen value of N 6 , this leads to k = 2.247. However, due to the requirement that no two surfaces be parallel, exact Brewster incidence is not possible for all plates and this results in losses. However, as seen in Fig. 2, even for the 6plate magnifier ...
... perpendicular component is Ty 1 . With the chosen value of N 6 , this leads to k = 2.247. However, due to the requirement that no two surfaces be parallel, exact Brewster incidence is not possible for all plates and this results in losses. However, as seen in Fig. 2, even for the 6plate magnifier ...
Linear momentum increase and negative optical forces
... Relying on gradient forces created by structured light, one can trap and move microscopic particles. Aside from the conservative action of gradient forces, light always pushes an object along its direction of propagation. Here, we demonstrate that gradientless light fields can exert pulling forces on ...
... Relying on gradient forces created by structured light, one can trap and move microscopic particles. Aside from the conservative action of gradient forces, light always pushes an object along its direction of propagation. Here, we demonstrate that gradientless light fields can exert pulling forces on ...
Optical gratings: Nano-engineered lenses - MiNa
... Simulations of a larger-NA device were also presented, in which the lens had a diameter of 50 μm, a focal length of 50 μm and an NA of 0.45. An important consideration in the application of these mirror reflectors is the range of phase shifts required. For example, the simulated design of Fattal et ...
... Simulations of a larger-NA device were also presented, in which the lens had a diameter of 50 μm, a focal length of 50 μm and an NA of 0.45. An important consideration in the application of these mirror reflectors is the range of phase shifts required. For example, the simulated design of Fattal et ...
Slow Light - Duke Physics
... At these wavelengths, the induced change in the group index has the opposite sign than for a saturable absorber, and the group index consequently can be less than unity or even negative. This sort of superluminal propagation was demonstrated in the laboratory.9 Modification of the group velocity by ...
... At these wavelengths, the induced change in the group index has the opposite sign than for a saturable absorber, and the group index consequently can be less than unity or even negative. This sort of superluminal propagation was demonstrated in the laboratory.9 Modification of the group velocity by ...
Optical properties of PbS thin films chemically deposited at
... which correspond to the diffraction lines produced by the (111), (200), (220) and (311) crystalline planes of the PbS cubic phase (galena), respectively. It is observed a preferred orientation growth along the (200) direction. It is also observed that the intensity of the peaks increases with the te ...
... which correspond to the diffraction lines produced by the (111), (200), (220) and (311) crystalline planes of the PbS cubic phase (galena), respectively. It is observed a preferred orientation growth along the (200) direction. It is also observed that the intensity of the peaks increases with the te ...
Suppression of optical damage at 532 nm in
... Gaussian boundary is actually a speckle pattern. The speckle pattern was observed even when a longer focal length lens (f = 250 mm) was used, indicating that it is likely originating due to the thickness of the samples (4 mm) which allows for constructive and destructive interference between the inc ...
... Gaussian boundary is actually a speckle pattern. The speckle pattern was observed even when a longer focal length lens (f = 250 mm) was used, indicating that it is likely originating due to the thickness of the samples (4 mm) which allows for constructive and destructive interference between the inc ...
Wavelength-tuning interferometry of intraocular distances
... path length is changed in order to match the light transit times in the reference beam to the light transit time in the object. An alternative approach for measuring optical distances is to use frequency- or Fourier-domain techniques. In these techniques a fixed-reference path length is used. The ob ...
... path length is changed in order to match the light transit times in the reference beam to the light transit time in the object. An alternative approach for measuring optical distances is to use frequency- or Fourier-domain techniques. In these techniques a fixed-reference path length is used. The ob ...
11.2 - Partial Refraction and Total Internal Reflection
... Sometimes when you look out a window, you see what is outside as well as your own reflection This is because some light reflects and some light refracts at a surface between two media that have different indices of refraction This phenomenon is called partial reflection and refraction ...
... Sometimes when you look out a window, you see what is outside as well as your own reflection This is because some light reflects and some light refracts at a surface between two media that have different indices of refraction This phenomenon is called partial reflection and refraction ...
1 Macleod ‐ Thin Film Optics
... Simple optical surfaces reflect a portion of the light. This can be a problem because not only is the desired light reduced, but also the reflected light is not lost, but just goes somewhere else. Somewhere else can often be the image plane, where it causes ghost images and veiling glare. Most s ...
... Simple optical surfaces reflect a portion of the light. This can be a problem because not only is the desired light reduced, but also the reflected light is not lost, but just goes somewhere else. Somewhere else can often be the image plane, where it causes ghost images and veiling glare. Most s ...
12. Infrared and Visible Waves
... If the angle of incidence of the light ray is greater than a specific value, called the critical angle, then the light ray is actually reflected. This is called total internal reflection. It makes the inner surface of glass act like a perfect mirror. 20 of 37 ...
... If the angle of incidence of the light ray is greater than a specific value, called the critical angle, then the light ray is actually reflected. This is called total internal reflection. It makes the inner surface of glass act like a perfect mirror. 20 of 37 ...
n 1n d
... H-PDLCs causes a huge variation of refractive index for light as well as for neutrons. • H-PDLC transmission gratings with the thickness of only few tens of micrometers act as extremely efficient gratings for neutrons. • The light induced refractive index-modulation for neutrons in HPDLCs is two ord ...
... H-PDLCs causes a huge variation of refractive index for light as well as for neutrons. • H-PDLC transmission gratings with the thickness of only few tens of micrometers act as extremely efficient gratings for neutrons. • The light induced refractive index-modulation for neutrons in HPDLCs is two ord ...
Reflection-mode scanning near-field optical microscopy: Influence
... polarization/magneto-optics, and topographic effects. © 1998 American Institute of Physics. @S0021-8979~98!09503-6# I. INTRODUCTION ...
... polarization/magneto-optics, and topographic effects. © 1998 American Institute of Physics. @S0021-8979~98!09503-6# I. INTRODUCTION ...
Research Express@NCKU Form (English example) Item Content
... To understand the polarization-dependent optical enhancements of metal nanoparticle pairs in more detail, we held the fiber probe at the central position between two nanoparticles and recorded the near-field optical signal once every 15 degrees of polarization rotation angle (θ). R is the radius of ...
... To understand the polarization-dependent optical enhancements of metal nanoparticle pairs in more detail, we held the fiber probe at the central position between two nanoparticles and recorded the near-field optical signal once every 15 degrees of polarization rotation angle (θ). R is the radius of ...
A negative permeability material at red light
... To test the fabricated samples, we measured the transmission and reflection spectra of the samples with an ultra-stable tungsten lamp (B&W TEK BPS100). The spectral range of the lamp covers the entire visible and near-infrared optical band. A Glan Taylor prism was placed at the output of the broadba ...
... To test the fabricated samples, we measured the transmission and reflection spectra of the samples with an ultra-stable tungsten lamp (B&W TEK BPS100). The spectral range of the lamp covers the entire visible and near-infrared optical band. A Glan Taylor prism was placed at the output of the broadba ...
The Spectrophotometer
... The “light control” shown in the diagram consists of a slotted piece of metal which can be moved back and forth in the light path. The bulb produces varying intensities at different wavelengths. The light control decreases high intensities by blocking some of the light with the slotted metal. The ri ...
... The “light control” shown in the diagram consists of a slotted piece of metal which can be moved back and forth in the light path. The bulb produces varying intensities at different wavelengths. The light control decreases high intensities by blocking some of the light with the slotted metal. The ri ...
Cost-effective optical coherence tomography spectrometer based on
... The feasibility of a TFBG-spectrometer for SD-OCT was successfully demonstrated. The prototypes maximum sensitivity reaches 108 dB at 100 µs integration time and an overall sensitivity fall-off of -34 dB across 6.4 mm detection length. Cross-sectional 2-D OCT images of a fruit, a human fingertip and ...
... The feasibility of a TFBG-spectrometer for SD-OCT was successfully demonstrated. The prototypes maximum sensitivity reaches 108 dB at 100 µs integration time and an overall sensitivity fall-off of -34 dB across 6.4 mm detection length. Cross-sectional 2-D OCT images of a fruit, a human fingertip and ...
An Introduction to Ultraviolet/Visible Molecular Absorption
... that, at a given thickness, the absorption coefficient introduced by Lambert’s law was directly proportional to the concentration of the absorbing substance in a solution. Combination of these two results gives the relationship now commonly known as Beer’s law. This law states that the amount of rad ...
... that, at a given thickness, the absorption coefficient introduced by Lambert’s law was directly proportional to the concentration of the absorbing substance in a solution. Combination of these two results gives the relationship now commonly known as Beer’s law. This law states that the amount of rad ...
Light Microscopy
... Light as electromagnetic wave with mutually perpendicular E, B components characterized by wavelength,λ, and frequency, ν, in cycles/s. Wave velocity = ν x λ. [λ=500nm--> ν=6x1014 cycles/s] ...
... Light as electromagnetic wave with mutually perpendicular E, B components characterized by wavelength,λ, and frequency, ν, in cycles/s. Wave velocity = ν x λ. [λ=500nm--> ν=6x1014 cycles/s] ...